Looper for sewing-machines



(No Model.) 2 sheets-sheen 1.

J.HBBBB.LING.

LOPER FOR SEWING MACHINES V No. 514,653. Patentedfeb. 13,189.4.

(No Model.) Y 1 Y 2 sheets-sheet 2. J. HBBE'RLING.

Loom-R Pon SEWING MACHINES. Y No. 514,653. Patented PebglS, 1894:.V

Y usual bobbin-case and bobbin from the shut* tle and inserting the looper the machine may to remove and insert the ordinary bobbiu case .bin-case removably inserted in the shuttle,

To all whom it may concern:

UNITED STATES PATENT JOHN HEBERLING, OF ROCHESTER, NEV YORK.

LOOPER FOR SEWINGMACHINES.

SPECIFICATION forming part of Letters Patent No. 514,653, dated February 13, 1894.

Application iiled August 19, 1891.

Be it known that I, JoHN HEBERLING, a citizen of the United States, residing at Rochester, in the county of Monroe and State of NewYork, have invented certain new and useful Improvements in Sewing-Machine Loopers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object to provide a rotating looper for forming a single thread chain stitch, the looper operating in the usual way to hold aloop of needle thread distended until the needle at its next descent can pass another loop through the Same the looper then releasing the first loop which is tightened as the succeeding loop, drawn through the first loop, is distended.

My improved looper is adapted to run in the race way of an ordinary rotary shuttle machine and is preferably removably attached to an ordinary rotary shuttle so that by removing the be instantly changed from a lock stitch to a chain stitch machine, or vice versa, with no more delay` or trouble than would be required and bobbin.

In theaccompanying drawings Figure l is a side view ot' a Standard rotary shuttle with my invention applied thereto. Fig. 2 is a top or edge view and Fig. 3 a section of the same. Figs. 4, 5, and G are detail views of the detachable looper removed from the shuttle. Fig. 7 represents a modification in which the looper is shown as being attached to a boband Fig. 8 is a section of the same on line 8"-8, Fig. 7. Fig. 9 represents my improved looper as being formed as a permanent part of the shuttle or body by which it is carried and which is thus a part of the looper proper. Figs. 10 and 1l represent the operation of my improved looper.

A denotes the body of an ordinary rotating or oscillating shuttle having at its periphery a point or beak afor seizing the loops of needle thread, the said body having a central circular recess a. for thereception of the bobbin case and bobbin.r

At the center of the recesso. is a point or Serial No.4031091. (No model.)

stud a2 which may be formed tubular or hollow, as in Fig. 3, or solid as in Fig. 8.

B denotes the looper proper the same consisting of a forked tail one prong b of which is formed short terminating some distance in advance of the beak of the shuttle and the other prong b of which is of sufficient length to extend slightly past the said beak and is curved or deflected to one side so as to leave a clear thread passage between the same and said beak, as more clearly shown in Fig. 2, and between the said short and long prongs is a space ha for the descent of the needle. The short prong Z1 is inclined outwardly from the body of the looper B forming an inclined loopretainiug shoulder at b2. The looper B is preferably formed integral with a body Z13 provided with a pin b4 to enter the hollow post a2 of the shuttle body A and pivoted to the said body b3 at b5 is a locking lever b having a projection bi adapted to enter a hole or recess a3 in the rim of the shuttle body to removably secure the looper proper to the said shuttle body, a spring, as c serving to force the said projection into said hole or recess. When the looper is to be removed from or inserted in the shuttle the operator takes the body portion h3 thereof between the thumb and linger and the pressure of the tinger on the curved portion ot the locking lever h6 withdraws the projection hl from the hole or recess of the shuttle, against the stress of the spring c, or holds said projection in such position that the looper may readily be inserted in operative posit-ion in the shuttle body or removed therefrom.

The operation ot' Inyinventiou is as follows: The body A with the attached looper being placed in position in the shuttle race of the machine and the latter being set in motion to rotate the said body and looper and reciprocate the needle the said needle first descends, and as it rises it throws out a loop of thread Which is caught by thefbeak of the body A and as the said body continues its rotationland the needle rises farther the said loop is spread around the said body or shuttle in the usual manner, until the shuttle orV body is in the position shown in Fig. 10 when IOO the loop, having been partly drawn up by the f the needle has again descended into the space bs between the prongs of the fork of the looper said needle carrying its thread through the now distended loop held by the fork of the looper. As the bodyA continues its rotation the first loop passes on to the long prong b', as shown in Fig. 11, and the beak ot' the body A now seizes a second loop from the needle as it rises, which second loop is drawn through the first loop as it is expanded and the said first loop is cast off from the laterally defiected tail of the said prong b and is tightened into the work. Thus the operation continues each loop being drawn through the previous loop and forming the Well known chain stitch.

In the modification shown in Figs. 7 and 8 the looper proper is attached to a bobbin case a4 which is fitted into the central recess in the shuttle bodyA in the usual manner, said bobbin case serving as a holder for the looper and being adapted to be removed from the bodyA when it is desired to replace the same by an ordinary bobbin case having a bobbin filled with locking thread to make the lock stitch.

In the form of my invention shown in Fig. 9 the looper proper is shown as being a per manent part of the body A. This form of my invention is not preferred for the reason that to change the machine from a lock stitch to a chain stitch it is necessary to remove the body A from the shuttle race and as this requires the removal of the usual iange which holds the shuttle in the race the change is more troublesome to make than when the looper is made detachable from the shuttle body.

While I have referred to the bodyA as being a shuttle or shuttle body it will be understood that when the looper proper is applied thereto the said body becomes a rotating looper of which the part to which I have hereinbefore referred to as the looper proper is merely a tail piece, and the term rotating looper as hereinafter employed in the claims of this specification will therefore be understood to include the body A.

The shuttle body or the body of my improved looper is independent of the shaft by which it is to be driven so that the needle thread passes around it in the same manner that it does around an ordinary shuttle, and the said loopermay therefore be said to be loose with reference to the shaft by which it is driven, and the term loose as used in connection with the term looper in the claims of this specification will therefore be understood to mean a looper or looper body which disconnected from its driving shaft.

Having thus described my invention, I claim and desire to secure by Letters Patent- 1. A loose rotating looper provided with a forked tail or looper proper removably attached thereto, one prong of said tail terminating in advance of the beak of the looper and the other being extended past the said beak.

2. A loose rotating looper having a forked tail which is removably attached thereto and one prong of which terminates in advance of the beak of the looper and the otherprong of which is extended past the said beak, combined with a spring-acted locking device for removably securing the said forked tail or looper proper to the body of the looper.

3. The combination with the rotating body A having a beak a and a centrally arranged pin or post a2 and a hole or recess a, of a looper B the body of which is provided with a pin supported by the said pin or post d2 and with a spring-acted locking lever having a prong to enter the said recess or hole a3.

In testimony' whereof I affix my signature in presence of two witnesses.

JOI-IN I-lEBERLING. u

Vitnesses:

JOHN F.. DURAND, WM. T. MCARTHUR. 

